In the southern tier region of New York state (more specifically Binghamton NY, "craving the walk home" is slang or colloquial term for walking back to ones residence from a particularly far distance after either leaving a function, bar, restaurant, or friends place of residence. This activity usually happens late at night while one is intoxicated.
Person 1: hey why are you in the middle of nowhere on snapmap?
Person 2: I am obscenely plastered and I am craving the walk home back to my dorm; I will be back in an hour.